51187248 has 80 divisors (see below), whose sum is σ = 167925760. Its totient is φ = 14624064.

The previous prime is 51187247. The next prime is 51187261. The reversal of 51187248 is 84278115.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51187247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5440 + ... + 11487.

It is an arithmetic number, because the mean of its divisors is an integer number (2099072).

Almost surely, 2^51187248 is an apocalyptic number.

It is an amenable number.

51187248 is an abundant number, since it is smaller than the sum of its proper divisors (116738512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51187248 is a wasteful number, since it uses less digits than its factorization.

51187248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16951 (or 16939 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 51187248 is about 7154.5263994202. The cubic root of 51187248 is about 371.2962762435.

The spelling of 51187248 in words is "fifty-one million, one hundred eighty-seven thousand, two hundred forty-eight".